#include <iostream>

using namespace std;

int main()
{
    string s, s1, s2;

    char c;
    while (cin >> c, c != ',') {
        s += c;
    }
    while (cin >> c, c != ',') {
        s1 += c;
    }
    while (cin >> c) {
        s2 += c;
    }

    if (s.size() < s1.size() || s.size() < s2.size()) {
        puts("-1");
    } else {
        int l = 0;
        while (l + s1.size() <= s.size()) {
            int k = 0;
            while (k < s1.size()) {
                if (s[l + k] != s1[k]) {
                    break;
                }
                k++;
            }
            if (k == s1.size()) {
                break;
            }
            l++;
        }

        int r = s.size() - s2.size();
        while (r >= 0) {
            int k = 0;
            while (k < s2.size()) {
                if (s[r + k] != s2[k]) {
                    break;
                }
                k++;
            }
            if (k == s2.size()) {
                break;
            }
            r--;
        }

        l += s1.size() - 1;

        if (l >= r) {
            puts("-1");
        } else {
            printf("%d\n", r - l - 1);
        }
    }

    return 0;
}
